Genetic architecture of rust resistance in a wheat (Triticum turgidum) diversity panel

Frontiers in Plant Science

Plant Science

Krystalee Wiebe¹  Amidou N’Diaye¹  Jennifer Ens¹  Teketel Haile¹  Valentyna Klymiuk¹  Andrii Fatiukha¹  Curtis J. Pozniak¹  Roi Ben-David²  Sariel Hübner³  Tamar Krugman⁴  Sylvie Cloutier⁵ 

[1] Crop Development Centre and Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada;Department of Vegetables and Field Crops, Institute of Plant Sciences, Agricultural Research Organization (ARO) – The Volcani Center, Rishon LeZion, Israel;Galilee Research Institute (MIGAL), Tel Hai Academic College, Upper Galilee, Israel;Institute of Evolution, University of Haifa, Haifa, Israel;Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, Canada;Department of Biology, University of Ottawa, Ottawa, ON, Canada;

关键词: wheat;    leaf rust;    stripe rust;    stem rust;    GWAS;    diversity panel;    Yr15;    Sr13;   

DOI  :  10.3389/fpls.2023.1145371

 received in 2023-01-16, accepted in 2023-02-24,  发布年份 2023

来源: Frontiers

【 摘 要 】

IntroductionWheat rust diseases are widespread and affect all wheat growing areas around the globe. Breeding strategies focus on incorporating genetic disease resistance. However, pathogens can quickly evolve and overcome the resistance genes deployed in commercial cultivars, creating a constant need for identifying new sources of resistance.MethodsWe have assembled a diverse tetraploid wheat panel comprised of 447 accessions of three Triticum turgidum subspecies and performed a genome-wide association study (GWAS) for resistance to wheat stem, stripe, and leaf rusts. The panel was genotyped with the 90K Wheat iSelect single nucleotide polymorphism (SNP) array and subsequent filtering resulted in a set of 6,410 non-redundant SNP markers with known physical positions.ResultsPopulation structure and phylogenetic analyses revealed that the diversity panel could be divided into three subpopulations based on phylogenetic/geographic relatedness. Marker-trait associations (MTAs) were detected for two stem rust, two stripe rust and one leaf rust resistance loci. Of them, three MTAs coincide with the known rust resistance genes Sr13, Yr15 and Yr67, while the other two may harbor undescribed resistance genes.DiscussionThe tetraploid wheat diversity panel, developed and characterized herein, captures wide geographic origins, genetic diversity, and evolutionary history since domestication making it a useful community resource for mapping of other agronomically important traits and for conducting evolutionary studies.

【 授权许可】

Unknown   
Copyright © 2023 Klymiuk, Haile, Ens, Wiebe, N’Diaye, Fatiukha, Krugman, Ben-David, Hübner, Cloutier and Pozniak